National Museum of Nuclear Science & History
Walter Johnson worked for the United States Engineer District Office.
A. J. MacDonald worked for the Union Carbide & Carbon Corporation.
Bretscher worked at Los Alamos during the Manhattan Project.
Barney J. O’Keefe served in the military as an ensign during the war. He was a member of Project Alberta, the team that transported and assembled the two atomic bombs preceeding the August 1945 bombing missions on Hiroshima and Nagasaki.
